US4978671A - Thieno (3',4'-4,5)imidazo(2,1-b)thiazole derivatives, a process for their preparation and their use in medicaments - Google Patents

Thieno (3',4'-4,5)imidazo(2,1-b)thiazole derivatives, a process for their preparation and their use in medicaments Download PDF

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Publication number
US4978671A
US4978671A US07/401,135 US40113589A US4978671A US 4978671 A US4978671 A US 4978671A US 40113589 A US40113589 A US 40113589A US 4978671 A US4978671 A US 4978671A
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formula
thieno
imidazo
denotes hydrogen
compound
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Expired - Fee Related
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US07/401,135
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English (en)
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Dieter Binder
Franz Rovenszky
Hubert P. Ferber
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Chemisch Pharmazeutische Forschungs GmbH
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Chemisch Pharmazeutische Forschungs GmbH
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Assigned to CHEMISCH PHARMAZEUTISCHE FORSCHUNGSGESELLSCHAFT M.B.H., ST. PETER-STRASSE 25, A-4021 LINZ reassignment CHEMISCH PHARMAZEUTISCHE FORSCHUNGSGESELLSCHAFT M.B.H., ST. PETER-STRASSE 25, A-4021 LINZ ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BINDER, DIETER, FERBER, HUBERT P., ROVENSZKY, FRANZ
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D513/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00
    • C07D513/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00 in which the condensed system contains two hetero rings
    • C07D513/04—Ortho-condensed systems
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D513/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00
    • C07D513/12—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00 in which the condensed system contains three hetero rings
    • C07D513/14—Ortho-condensed systems
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00—Drugs for immunological or allergic disorders

Definitions

  • the invention relates to thieno(3',4'-4,5)imidazo(2,1-b)thiazole derivatives, a process for their preparation and their use in medicaments for stimulating the immune system.
  • the invention therefore relates to compounds of the formula ##STR2## in which R 1 denotes hydrogen, halogen or trifluoromethyl and R 2 denotes hydrogen or C 1 -C 4 alkyl, and, in the case in which
  • R 2 denotes hydrogen, their pharmaceutically utilizable salts.
  • C 1 -C 4 alkyl used in this description signifies straight-chain or branched saturated hydrocarbon radicals having 1 to 4 carbon atoms, such as, for example, methyl, ethyl, propyl, isopropyl, butyl, isobutyl or tert. butyl.
  • halogen signifies chlorine, bromine or fluorine.
  • a prefered class of the compounds of the formula I is that in which R 1 denotes chlorine and R 2 denotes hydrogen or methyl.
  • Particularly preferred individual compounds are:
  • dehydrating agents can be used as dehydrating reagents in the cyclization of compounds of the formula II.
  • Polyphosphoric acid or phosphorus oxychloride which can be used at the same time as a solvent, are preferred.
  • the cyclization temperature should be about 60° C. to 110° C. In phosphorus oxychloride, the cyclization is best carried out at reflux temperature.
  • the reaction time depending on the temperature and the cyclization agent, is between about 10 minutes and 4 hours.
  • esters of the formula I can be hydrolyzed by boiling with bases, preferably using equivalent amounts of alkali metal hydroxide solutions and advantageously with the addition of a solubilizer such as, for example, methanol or ethanol, to give compounds of the formula I, in which R 2 denotes hydrogen in nearly quantitative yields.
  • a solubilizer such as, for example, methanol or ethanol
  • the compounds of the formula I which have a free carboxyl group obtained in the reaction in process step b) can be converted into their pharmaceutically utilizable salts in a customary manner using inorganic or organic bases.
  • Salt formation can be carried out, for example, by dissolving the compounds of the formula I mentioned, in which R 2 denotes hydrogen, in a suitable solvent, such as, for example, water or a lower aliphatic alcohol, adding an equivalent amount of the desired base, ensuring thorough mixing and, after completion of salt formation, distilling off the solvent in vacuo. If desired, the salts can be recrystallized after isolation.
  • Pharmaceutically utilizable salts can be metal salts, in particular, alkali metal or alkaline earth metal salts, such as sodium salts, potassium salts, magnesium salts or calcium salts.
  • Other pharmaceutically utilizable salts are also, for example, easily crystallizing ammonium salts.
  • ammonia or organic amines for example, mono-, di- or tri-lower-(alkyl, cycloalkyl or hydroxyalkyl)amines, lower alkylenediamines or (hydroxy lower alkyl or aryl lower alkyl) lower alkyl ammonium bases, for example methylamine, diethylamine, triethylamine, dicyclohexylamine, triethanolamine, ethylenediamine, tris(hydroxymethyl) aminomethane, benzyl-trimethylammonium hydroxide and the like.
  • ammonia or organic amines for example, mono-, di- or tri-lower-(alkyl, cycloalkyl or hydroxyalkyl)amines, lower alkylenediamines or (hydroxy lower alkyl or aryl lower alkyl) lower alkyl ammonium bases, for example methylamine, diethylamine, triethylamine, dicyclohexylamine, triethanolamine, ethylene
  • novel compounds of the formula I and their pharmaceutically utilizable salts show an excellent stimulation of the immune system of in vitro models.
  • This stimulation of the immune system can be measured, for example, by measurement of the anti-inflammatory activity of the test substances in the adjuvant-induced rat polyarthritis test.
  • Example 3 3-(4-chlorophenyl)thiazolo(3,2-a)benzimidazole-2-acetic acid
  • novel compounds can be used as medicaments alone or mixed with other active substances in the form of customary galenical preparations in disorders which are caused by a defective immune system, such as, for example, cancer or rheumatoid arthritis.
  • the compounds of the formula I are intended for use in humans and can be administered in a customary manner, such as, for example, orally or parenterally. They are preferably administered orally, the daily dose being 0.1 to 100 mg/kg of body weight, preferably 0.2 to 20 mg/kg of body weight.
  • the treating physician can also prescribe doses above or below this, however, depending on the general state and age of the patient, the appropriate substance of the formula I, the nature of the disease and the manner of formulation.
  • the doses are approximately on the same scale as in the treatment case. Oral administration is also preferred in the case of prophylaxis.
  • the compounds of the formula I can be administered alone or in combination with other pharmaceutically active substances, the content of the compounds of the formula I being between 0.1 % and 99%.
  • the pharmaceutically active compounds are present mixed with suitable inert auxiliaries and/or excipients or diluents, such as, for example, pharmaceutically acceptable solvents, gelatine, gum arabic, lactose, starch, magnesium stearate, talc, vegetable oils, polyalkylene glycol, petroleum jelly and the like.
  • the pharmaceutical preparations may be present in solid form, for example as tablets, coated tablets, suppositories, capsules and the like, in semi-solid form, for example as ointments or in liquid form, for example as solutions, suspensions or emulsions. If appropriate, they are sterilized and contain auxiliaries, such as preservatives, stabilizers or emulsifiers, salts for altering the osmotic pressure and the like.
  • compositions may in particular contain the compounds according to the invention in combination with other therapeutically useful substances.
  • the compounds according to the invention can be formulated with these, for example, together with the abovementioned auxiliaries and/or excipients or diluents, to give combination preparations.
  • the starting material can be prepared as follows:
  • the experimental substances were administered intraperitoneally in a concentration of 10 mg/kg of body weight daily over a period of 16 days to female Lewis rats which have an inborn immune defect. 6 animals were employed with each substance. Animals which received 0.5% carboxymethylcellulose instead of the active substance were used as controls.
  • day zero i.e. one day before the beginning of the administration of the experimental substances
  • a subplantar injection of 0.75 mg of Mycobacterium butyricum in 0.1 ml of Freund's adjuvant was made in the right foot of each experimental animal.
  • a secondary reaction took place in the left foot, which was not injected, which was manifested by a swelling of the foot. Since this swelling is caused by an immune reaction, substances which reduce this genetically conditioned and morbid reaction are designated as immunomodulators.
  • the size of the swelling was measured daily by plethysmometry and indicated in ml.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Animal Behavior & Ethology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Engineering & Computer Science (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Pain & Pain Management (AREA)
  • Rheumatology (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
US07/401,135 1988-09-08 1989-08-30 Thieno (3',4'-4,5)imidazo(2,1-b)thiazole derivatives, a process for their preparation and their use in medicaments Expired - Fee Related US4978671A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2202/88 1988-09-08
AT0220288A AT394046B (de) 1988-09-08 1988-09-08 Neue thieno(3',4'-4,5)imidazo(2,1-b)thiazolderivate, verfahren zu ihrer herstellung und ihre verwendung

Publications (1)

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US4978671A true US4978671A (en) 1990-12-18

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US07/401,135 Expired - Fee Related US4978671A (en) 1988-09-08 1989-08-30 Thieno (3',4'-4,5)imidazo(2,1-b)thiazole derivatives, a process for their preparation and their use in medicaments

Country Status (23)

Country Link
US (1) US4978671A (de)
EP (1) EP0358116A3 (de)
JP (1) JPH02115189A (de)
KR (1) KR900004747A (de)
CN (1) CN1025197C (de)
AT (1) AT394046B (de)
AU (1) AU616301B2 (de)
CS (1) CS275035B2 (de)
DD (1) DD284236A5 (de)
DK (1) DK441689A (de)
FI (1) FI89363C (de)
HU (1) HU201330B (de)
IL (1) IL91544A0 (de)
LT (1) LT3946B (de)
MY (1) MY105044A (de)
NO (1) NO893428L (de)
NZ (1) NZ230555A (de)
PH (1) PH26102A (de)
PT (1) PT91656B (de)
SU (1) SU1739851A3 (de)
UA (1) UA13480A (de)
YU (1) YU171789A (de)
ZA (1) ZA896682B (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4214089A (en) * 1978-07-18 1980-07-22 American Home Products Corporation Thiazolo[3,2-a]benzimidazoles, imidazo [2,1-b]thiazoles, and related compounds as antineoplastic agents, and enhancers of the immune response
US4244952A (en) * 1978-09-28 1981-01-13 Yoshitomi Pharmaceutical Industries, Ltd. Imidazo[2',1':2,3]-thiazolo[5,4-c]pyridines and composition thereof for treating immune diseases
US4293696A (en) * 1980-12-22 1981-10-06 American Home Products Corporation 3-Substituted phenylthiazolo[3'2':1,2]imidazo[4,5-b]pyridine-2-alkanoic acids
EP0284893A2 (de) * 1987-04-03 1988-10-05 Hafslund Nycomed Pharma Aktiengesellschaft Neue Thieno-imidazo(2,1-b)thiazol-Derivate, ein Verfahren zu ihrer Herstellung und diese enthaltende pharmazeutische Präparate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4214089A (en) * 1978-07-18 1980-07-22 American Home Products Corporation Thiazolo[3,2-a]benzimidazoles, imidazo [2,1-b]thiazoles, and related compounds as antineoplastic agents, and enhancers of the immune response
US4244952A (en) * 1978-09-28 1981-01-13 Yoshitomi Pharmaceutical Industries, Ltd. Imidazo[2',1':2,3]-thiazolo[5,4-c]pyridines and composition thereof for treating immune diseases
US4293696A (en) * 1980-12-22 1981-10-06 American Home Products Corporation 3-Substituted phenylthiazolo[3'2':1,2]imidazo[4,5-b]pyridine-2-alkanoic acids
EP0284893A2 (de) * 1987-04-03 1988-10-05 Hafslund Nycomed Pharma Aktiengesellschaft Neue Thieno-imidazo(2,1-b)thiazol-Derivate, ein Verfahren zu ihrer Herstellung und diese enthaltende pharmazeutische Präparate

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
Dauben, "J. Org. Chem." 15, 785-789 (1950).
Dauben, J. Org. Chem. 15, 785 789 (1950). *
Gilman et al., "Agents and Actions", vol. 17 (1), 53-59 (1985).
Gilman et al., Agents and Actions , vol. 17 (1), 53 59 (1985). *
Outerquin, "Bull. Soc. Chem. Fr.", 5-6 159-163 (1983).
Outerquin, Bull. Soc. Chem. Fr. , 5 6 159 163 (1983). *

Also Published As

Publication number Publication date
CS8905106A3 (en) 1992-01-15
DD284236A5 (de) 1990-11-07
EP0358116A2 (de) 1990-03-14
AT394046B (de) 1992-01-27
FI894193A (fi) 1990-03-09
FI89363B (fi) 1993-06-15
HUT51631A (en) 1990-05-28
NO893428L (no) 1990-03-09
DK441689A (da) 1990-03-12
LTIP1811A (en) 1995-08-25
CS275035B2 (en) 1992-01-15
LT3946B (en) 1996-05-27
AU4109889A (en) 1990-03-15
CN1025197C (zh) 1994-06-29
PT91656B (pt) 1995-05-31
IL91544A0 (en) 1990-04-29
ATA220288A (de) 1991-07-15
UA13480A (uk) 1997-04-25
PH26102A (en) 1992-02-06
NO893428D0 (no) 1989-08-25
PT91656A (pt) 1990-03-30
FI89363C (fi) 1993-09-27
ZA896682B (en) 1990-08-29
JPH02115189A (ja) 1990-04-27
FI894193A0 (fi) 1989-09-06
SU1739851A3 (ru) 1992-06-07
MY105044A (en) 1994-07-30
EP0358116A3 (de) 1991-08-21
KR900004747A (ko) 1990-04-12
HU201330B (en) 1990-10-28
CN1040983A (zh) 1990-04-04
AU616301B2 (en) 1991-10-24
YU171789A (en) 1991-04-30
NZ230555A (en) 1991-02-26
DK441689D0 (da) 1989-09-07

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